Code No.B240E RR antenna (indoor) open
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When replacing the ECU, always check that the communication circuit is normal.
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DIAGNOSTIC FUNCTION
If an open or short to earth circuit is detected in the inside transmission antenna (rear), the diagnosis code is set.
JUDGEMENT CRITERIA
An open circuit or short to earth is detected consecutively five times when radio waves are sent from the inside transmission antenna (rear).
PROBABLE CAUSES
- Malfunction of the inside transmission antenna assembly (rear)
- Malfunction of the KOS&OSS-ECU
- Damaged wiring harness and connectors
DIAGNOSIS PROCEDURE
STEP 1. Check of short to earth or open circuit in INRP, INRG line between the inside transmission antenna assembly (rear) connector and the KOS&OSS-ECU connector
Q.
Is the check result normal?
Go to Step 2.
Repair the wiring harness.
STEP 2. Keyless operation system communication test
Check that the communication with the inside transmission antenna assembly (rear) is normal (Refer to Antenna Test 
).
OK: Normal is displayed.
Q.
Is the check result normal?
Go to Step 3.
Replace the inside transmission antenna assembly (rear).
STEP 3. Check whether the diagnosis code is set again.
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(1)Erase the diagnosis code.
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(2)Engine switch: "LOCK" (OFF)
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(3)Close all the doors and press the driver’s side lock/unlock switch to lock and unlock the door several times.
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(4)Check if the diagnosis code is set.
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Q.
Is the diagnosis code set?
Replace KOS&OSS-ECU and register the ID codes (Refer to ).
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).